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对桤木优树树高、胸径、材积、单株纤维量、纤维长、纤维长宽比、纤维含量、木材密度的变异规律和各性状间的相关关系进行了研究。结果表明:性状变异系数规律是生长性状大于材性性状;各性状间没有显著相关,各性状可独立改良;材积、纤维含量、木材密度对单株纤维量的贡献率分别为67.47%、17.02%、15.51%;各性状的改良潜力是:材积可达1倍以上,胸径48%,树高18%,木材密度可提高10%以上,纤维含量可提高4%以上,纤维长度、长宽比分别可提高7%、12%以上,生长与材性联合改良的效益在30%以上。
The tree height, diameter at breast height, volume, individual fiber amount, fiber length, fiber aspect ratio, fiber content, wood density variation law and the correlation between the characters were studied. The results showed that the law of coefficient of variation was that the growth traits were larger than the wood traits. There was no significant correlation among the traits, and the traits of each trait could be improved independently. The contribution rates of volume, fiber content and wood density to individual fiber were 67.47%, 17.02% , 15.51%. The improvement potential of each trait is that the volume can reach more than 1 times, the diameter at breast height is 48%, the height of tree is 18%, the density of wood can increase more than 10%, the fiber content can increase more than 4%, the fiber length, aspect ratio Can be increased by 7%, 12% or more, the joint improvement of growth and material benefits more than 30%.